What tool is used to adjust the brake shoes to the drum?

The brake shoe adjusting tool is specifically designed for adjusting the spacing between the brake shoes and the drum in drum brake systems. This tool allows the technician to effectively manipulate the adjuster mechanism that expands or contracts the shoes, ensuring that they are properly positioned to make contact with the drum. Proper adjustment is essential for maintaining optimal braking efficiency, preventing excessive brake drag, and ensuring even wear of the brake components.

In contrast, the other tools listed serve different purposes. A brake line wrench is used primarily for loosening and tightening brake line fittings. A caliper tool is often utilized to compress brake calipers during pad replacement but is not suitable for adjusting drum brakes. A socket wrench is a general-purpose tool for various fastening tasks but does not specifically cater to the precise adjustments needed for brake shoe alignment. Hence, the brake shoe adjusting tool is the most appropriate choice for this particular function.